Today 187 tumour sample are collected and archived in the pathology department of Saint Antoine hospital (Paris). Among these 187 tumours the tumour stage are: stage 0: 4, stage I: 10, stage II: 34, stage III: 63, undetermined stage non-metastatic: 30 (thus 141 non-metastatic tumours) and stage IV: 48, and the primary are: duodenum: 128, jejunum: 31, ileon: 27, undetermined: 3. The chemotherapy performed was FOLFOX in 80% of the cases.